Hi, I couldn't get the issue. There is no border on Sidebar Component. Could you send like a screenshot or codesandbox example that I can see your case please ?
I explained it in a wrong way. It is not about the sidebar actually, it is about the styling of the menu component. It has an outline and I don't want it.
Sorry, but I really couldn't understand the issue. If you could be more specific and share a link that contains screenshot of your problem, I'll be ready to help.
